That newly-completed district heating system of the Toronto Terminals Railway is quite prominent. Two massive smokestacks. It supplied steam heat and power to both Union Station and the Royal York Hotel. Thomas C McAree, Vern Mcaree's brother, was the chief engineer there at this time. Here are my notes from a 1960 Globe & Mail article on this building:
The Toronto Terminal Co’s heating plant at the foot of York St, already the largest in Canada is to be expanded by 1/6 next December. Plant now heats the Royal York Hotel, Union Station and the Dominion Government Building on Front St and Post Office, the Workmen’s Compensation building on the waterfront and the CNR and CPR Express buildings, numerous outbuildings and signal cabins and via a ½ mile pipeline, the CNR roundhouse on Spadina Ave. The expansion involves a new 100,000 lbs./hr. boiler to bring the plant to 420,000 lbs./hr. The new boiler will be the third of its size installed since 1958, replacing a 35,000 lbs./hr. boiler and leaving3 x 35,000 lbs./hr. boilers in operation. Present plant has 6 furnaces which consume 50,000 tons of West Virginia Coal per year which is pulverized before combustion. The plant has been in continuous operation for 31 years. Chief Engineer W E Matheson monitors smoke daily, and the plant has elaborate smoke detection and monitoring equipment. When smoke reaches the bylaw infraction threshold an alarm sounds and the operators can adjust oxygen (via blowers) and fuel ([Toronto] Globe & Mail 23 Sep 1960 p. 21).